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【单选题】Since William had been seriously ill for several months, his parents were worried about ________ to return to school full-time. A. he wanted B. he wanting C. him to want D. his wanting
A.
he wanted
B.
he wanting
C.
him to want
D.
his wanting
【简答题】对于在[a，b]上有意义的两个函数f（x）与g（x），如果对任意的x∈[a，b]，均有|f（x）-g（x）|≤1，则称f（x）与g（x）在[a，b]上是接近的，否则称f（x）与g（x）在[a，b]上是非接近的．现在有两个函数f（x）=log t （x-3t）与g（x）=log t （ 1 x-t ）（t＞0且t≠1），现给定区间[t+2，t+3]． （1）若t= 1 2 ，判断f（x）与g（x）是...
【简答题】如果函数f（x）=-x 2 +2ax在区间[1，2]上是减函数，那么实数a的取值范围是a≤1a≤1．如果函数f（x）=-x 2 +2ax与函数 g(x)= a x+1 在区间[1，2]上都是减函数，那么实数a的取值范围是0＜a≤10＜a≤1．
【单选题】听力原文： Back in those primitive times it was unnecessary to have a special form. of exchange value for everything, like a price. In those times the only things that were really valuable were the skills ...
A.
Life was easy and food was easy to find.
B.
People care more about how to survive.
C.
The people took care of each other out of love.
D.
There are many developed individual monetary systems.
【简答题】对于定义在区间[m，n]上的两个函数f（x）和g（x），如果对任意的x∈[m，n]，均有不等式|f（x）-g（x）|≤1成立，则称函数f（x）与g（x）在[m，n]上是“友好”的，否则称“不友好”的．现在有两个函数f（x）=log a （x-3a）与 g(x)=lo g a 1 x-a （a＞0，a≠1），给定区间[a+2，a+3]． （1）若f（x）与g（x）在区间[a+2，a+3]上都有意义，...
【单选题】听力原文： Back in those primitive times it was unnecessary to have a special form. of exchange value for everything, like a price. In thee times the only things that were really valuable were the skills t...
A.
Life was easy and food was easy to find.
B.
People care more about how to survive.
C.
The people took care of each other out of love.
D.
There are many developed individual monetary systems.
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